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Chevy Impala "REDUCED ENGINE POWER" message

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  • FINALLY FIXED, "SERVICE STABILITRAK & TRACTION CONTROL DIAGNOSTIC PROBLEM: "SERVICE STABILITRAK", "SERVICE TRACTION CONTROL", "HARD SHIFT 1-2 GEARS"-(STABILITRAK TURNING OFF-CLUNK NOISE) "STABILITRAK OFF",

    "TRACTION CONTROL OFF"

    CAUSE:

    FUEL WAS 45% ETHANOL @ 85-(COSTCO GAS)-COMPUTER WENT INTO LIMP MODE CAUSING (AFM) TO GET STUCK AND NOT RESET COMPUTER.

    SOLUTION: DRAINED & CLEANED GAS TANK- CHANGED FUEL FILTERS (*ONLY IF NEEDED) CLEANED INJECTORS- RESET COMPUTER- FILLED GAS TANK WITH NO ETHANOL- (http://pure-gas.org/index.jsp)

    TOTAL AMOUNT WITH TAX: $444.86

    REFERENCES (STABILITRAK CLUNK NOISE): http://chevroletforum.com/forum/silverado-fullsize-pick-ups-21/2010-silverado-stabilitrak-question-47580/ (AFM)-Definition: http://en.wikipedia.org/wiki/Active_Fuel_Management (ETHANOL): http://en.wikipedia.org/wiki/Common_ethanol_fuel_mixtures (GAS STATIONS WITHOUT ETHANOL): http://pure-gas.org/index.jsp

  • I had the same message about Stabilitrak/Traction Control/Reduced Engine Power on my 2009 Impala SS with 94,000 miles. Car slowed to 40 mph. I pulled off and waited a couple minutes for computer to reset and drove safely to my dealer. Code for Throttle Position sensor. Since I was still within the 5 year/100,000 mile power train warranty, the dealer replaced the throttle body without charge. He also found excess play in the left front wheel hub and replaced that at no charge under the power train warranty.

  • I came across this forum tonight because the same thing just happened to me today with my 2011 Buick Lucerne CXL. I had just left my job and was about 3-4 miles along, getting onto a very backed-up ramp to the freeway (subzero temps, black ice and snow today). Another driver had just let me merge in front of them on the ramp and my car just stopped. I saw alternating warnings of 'Service Stabilitrak' and the 'Low Engine Power' thing too and also the service engine light. In my panic I can't remember for sure but at times it seemed like the brake pedal was intermittently stuck down as well (not 100% on that). I pushed the OnStar button for assistance- they called for a State Patrol Officer who arrived maybe 10-15 minutes later. My car then did move as I followed the Officer to the nearest exit and the car was pretty shaky/bumpy at times, feeling like it could stop again at any time. I had to wait a couple of hours to get a tow truck and by then the Service Stabilitrak' and low power warnings were gone- only the service engine light was still on.

    I bought the Lucerne new in 2010 and it has 53,000 miles on it. I just paid about $500.00 for a 50,000 maintenance at a GM facility about 10 miles from my home and thought all would be well for the winter but obviously not! I have a 34-mile commute through heavy traffic (as well as some wicked winter weather conditions at the moment) and after reading what's been posted here am not feeling very comfortable about what might be to come. Due to transportation issues I had the vehicle towed to a local auto repair shop- not a GM specific one- so will have to see what they come up with. Obviously this issue has been going on for quite some time and it does sound like some type of recall should have been done. I know that on the 50,000 service that I just had that they did a couple of warranty things but apparently they weren't aware of this issue. Like some others have posted I too fear for my safety because with the type of weather, traffic and freeways that I have to deal with, a loss of power/control could be very dangerous to myself and others.

  • I have a 2007 Impala with the engine loss of power issue. It just started today. My mother in law had a 2006 Impala that had this same problem. hers started when her mileage reached about 65,000 miles. my impala has 66,000 miles on it. I don't have the resorces to keep going to a mechanic over and over to get it fixed. I would like to see if anybody has a true fix for this issue. It sounds as if maybe a recall is in order.

  • I had to take my 2011 Impala in for a third time. I told the mechanic that Chevy had a pretty good money maker on their hands. Of course he didn't say anything. I asked him if this would take care of the problem and his answer was that there are several stabilitrac sensors and he couldn't say. I put $900 into this car in less than 3 months for the same problem. I almost got into an accident because of this problem that Chevy refuses to address. I would like to know what must happen before they finally do a recall on stabilitrak. I think it does more harm than good. I have written GM with no response. Am I surprised...no. We are nothing to them, they got their money maker and are not about to give it up.

  • i have a 2007 chevy impala a little over 130k miles on it..i was having similar reduced engine power problems with it & finally tried replacing peddle sensor a couple weeks ago..so far its been good the engine light hasnt came back on once it was replaced but im also having problems with the engine shutting off when i come to a complete stop!!?
  • I have a 2013 Chevy Impala with the same issues. reduce power and traction control issue. It was in the shop during Christmas week and now it has been in the shop for the last 6 days and they cannot seem to find the problem. Very frustating, I drive 3 hours a day to work, very concerned with the reduce engine power while driving on interstate, safety is my major concern. You cannot drive safely on interstate at 40 mph. The car only has 24,000 miles on it and already having these type of issue.

  • atandt3katandt3k Posts: 2

    I have a 2009 Impala LT. The Reduced Engine power problem started around 42k. The dealer replaced the accelerator pedal. Then at 80k it became sporadic, but same code Reduced Engine Power. I took it to a dealer they could not find anything. Problem continued. The car will code even when sitting in the drive way. I have changed 3 throttle body's and taken it to the dealer to get programmed, and still it continues. Recently it does it when it’s raining or icy, or snowing. I believe it has to do with the wheel speed sensors and GM needs to pay attention to were they place the wiring harness mine was on top of the engine bolt. I moved it and wrapped it with electrical tape. It helped but still trips. Today I reset the codes, turned off the traction control; I drove it 2 miles from the house barely 30mph, and caught a slick spot. The Reduced Engine power came on and shut the car off while I was turning. It keeps tripping P2176, Throttle Position, P2138 Accelerator position sensor. I love the car, but it has become Dangerous and blimishing the Chevy name! The problem is not only to Impala's, but to Malibu, Equinox, Traverse, and Silverado. Please don't make it a Ford Pinto problem, and Chevy needs to recall this before people get hurt or killed.

  • lakeluvr27lakeluvr27 Missouri Posts: 1
    edited January 22
    Add 2 more Impala's & an Express van, with same problems as everyone else, to this list.
  • Well after reading these post Chevy can count on me not buying a impala. I already own a Yukon with the same issues. Thought buying a car would make life simpler for me until the Yukon is figured out. So long GM/Chevy from a long time buyer. Now it is time to take a look at Ford!

  • Add another one to the list- 2010 impala same thing have not taken to service yet just came on last night then went out came back this morn. Really makes you wonder why it has not been a recall. I use to be a diehard Chevy but lately not so sure. 55,000 mile

  • I've had this very problem with the reduce engine power for about 6 months I've had both mufflers replaced $280, $100 for the PCM flash 6 updates they said it needs but none pertaining to this problem new TPS $280 ,new accl. pedal $75 took to the dealer for them to tell me nothings wrong. I really believe it's a faulty PCM. Which would cost GM a small fortune If they where to recall all of them. It's like a kid with a new toy they play with until it's no longer stimulating To them. The PCM is the same way with new parts It's happy for a min until it's not enough to satisfy it.
  • Day 1

    Hi all,

    As I see on the forums there are many issues with what seems to be the Throttle Body, sensor etc. Here is my wonderful story and I will be updating regularly in the next few days. I will add that I commute at least 2 hours per day and rely heavily on my car for work and to take care of my 2 children - 1 of which is special needs.

    Car: 2011 Chevy Impala LS 61K miles (90% of which were highway) Running full synthetic oil - changed every 5-6K miles

    Problem:

    Left work last night and not driving for more than 30 seconds when the engine light came on followed quickly by what can only be described and mild to moderate jack hammering of the car and the "Service Stabilitrak & reduced power to engine" message. I pulled over, checked the manual - then Google/Edmunds which brought me here.

    Status:

    I got a ride home after securing the vehicle and came back this morning. Got it towed to the dealership and was told that it was out of bumper to bumper warranty and that it wouldn't be covered under the Powertrain warranty if it was the throttle body or any of the associated sensors.

    I'm currently awaiting the call back from the dealership regarding the diagnostic result ($125) and will post everything as it becomes available in an attempt to help anyone else having a similar issue.

    It's a shame too - after the research I had done on this car I thought it would be more reliable than my old 2005 Ford Focus. But since May 2013 I've now been left dead by the side of the road twice... first time with a blown thermostat!

    So - as I said - waiting on service calling me back. I've also taken the liberty of emailing socialmedia@gm.com with the details of the vehicle. I'm trying to take a positive approach to this in the hope GM customer Service will pull through for one of its customers... I can only hope they do!

    Good luck and safe driving! Updates coming soon!

    Day 2

    So I sent a little email to GM regarding this issue and my situation.

    90 minutes after sending the email I received a call from a GM customer service rep that passed me through to a district agent. Linda (the agent) was exceptionally nice, took the details of the issues I'm having as well as previous issues with the vehicle (blown thermostat), contact info for the dealership/service center I dropped the car off at etc.

    She said she'd contact the service center directly to follow through and see what could be done with my case.

    Upon hanging up the service center called and confirmed that it is indeed the throttle body, that it isn't covered under the 5 year/100K powertrain (as of 2010 on all models apparently) and that it would be $650 out the door for parts & labor.

    At this time as I need the vehicle I've approved the work and will be picking it up on Saturday as I'm currently travelling for work... more updates to follow!

    Follow-up as of today (Day 3)...

    No return call from the GM district rep but got a call today to say my vehicle had been repaired, that the GM rep had called the shop directly and that GM has discounted the cost of the repairs.

    Initial cost was an even $650 + tax ($679) Discounted cost is $571.98.

    At this point I'll be forking out the money as I need my car back. Not sure if anyone else has attempted to contact GM with any similar results - would be good to hear from you if you did!

    Drew

  • Well I googled this problem this morning when my car did same thing! I got in it this morning crunk it up it Isolde kinda funny to me but I went on made it to end of my rd hit hwy 26 an the service traction an engine light came on an reduced speed to 40 my car is a 2011 impala with 80,000 miles this is not the first problems I had first problem hit last year during summer when my vents quit blowing heat or air out u can hear ac kicking on but nothing will blow out vents and also my temperature gauge dropped all the way dwn past cold mark an the message read ( engine hot ac off) I pulled over popped hood nothing wasn't running hot nothing so I figured it was a censor gone bad then I have really bad corrosion on my battery so after reading some of the comments on here this morning when my car lost speed I pulled in at the store went in bought a can coke an poured it on the corrosion on my battery got back in my car crunk it up an it drove fine all the way to work witch is 62miles away so when I get back in it to travel home I pray it's just a battery I can replace if there is any more siegestions or answers to wy every impala is doing this plz help me not spend a fourtune trying to replace everything on the car! Seems to me Gm def needs a recall!!!!
  • I am totally sickened & disgusted by the fact that there are all these stories on here about people that are having serious, possibly life threatening issues with their Chevy Impala's, and nothing is being done about it. There are pages and pages of the exact same issues with not always happy endings. I got my first message this morning on my car about the engine power being reduced. After spending some time reading all of these posts, I am quite frankly terrified. Why has nothing been done about this? I am so pissed off about this. We only matter when we are paying for the vehicles?????? I'm just sick.

  • gmcustsvcgmcustsvc Posts: 4,068

    Hello siesie2012,

    I am saddened to hear that you are experiencing reduced engine power with your Impala. I would be happy to assist you with getting this concern addressed. If this is something you would like my support with please send an email to ATTN: Jonathan A. at socialmedia@gm.com. Please include your username, name, address, phone number, VIN, current mileage, and involved dealership.

    I look forward to receiving your reply,

    Jonathan A. GM Customer Care

  • gmcustsvcgmcustsvc Posts: 4,068

    @brandisangels said: Well I googled this problem this morning when my car did same thing! I got in it this morning crunk it up it Isolde kinda funny to me but I went on made it to end of my rd hit hwy 26 an the service traction an engine light came on an reduced speed to 40 my car is a 2011 impala with 80,000 miles this is not the first problems I had first problem hit last year during summer when my vents quit blowing heat or air out u can hear ac kicking on but nothing will blow out vents and also my temperature gauge dropped all the way dwn past cold mark an the message read ( engine hot ac off) I pulled over popped hood nothing wasn't running hot nothing so I figured it was a censor gone bad then I have really bad corrosion on my battery so after reading some of the comments on here this morning when my car lost speed I pulled in at the store went in bought a can coke an poured it on the corrosion on my battery got back in my car crunk it up an it drove fine all the way to work witch is 62miles away so when I get back in it to travel home I pray it's just a battery I can replace if there is any more siegestions or answers to wy every impala is doing this plz help me not spend a fourtune trying to replace everything on the car! Seems to me Gm def needs a recall!!!!

    Hi brandisangel,

    Please keep us posted on the status of your vehicle. If you need to go into the dealership for service, we would be happy to reach out to them to see what repair options are out there for you. If you have any questions or concerns, please message us your full contact information, VIN, and the name of your preferred dealership.

    Thank you,

    Amber N. GM Customer Care

  • I was driving and the REDUCED ENGINE POWER warning flashed and check engine light came on. Also the car dropped down to 20mph while I was driving on a very busy street.Thank God I wasn't on the highway !! I took the car to AutoZone to have the check engine light diagnosed and came up with two codes : P2119 and P2135 . 2135 goes to a throttle position sensor but they told me at AutoZone that it does not come separate and I'd have to buy the whole throttle body. I researched online and discovered that now they have started selling the replacement part separately (AC Delco part 19300180). Is there an easy way to tell what I need to replace ? I really don't want to go to a Chevy dealership as I've had bad experiences already with the two closest to me.

  • Had the issue today with my 2009 Chevy Impala which has 67,000 miles on it. Was on the highway when the service transaction control and engine power reduced came on. Car would not drive over 30mph. Thank god the weather was bad and was only driving around 30-40. I was able to get off the high and drove back home. Called my dealership Sunny Side Chevy in Elyria Ohio and they had me bring it in said by me telling them they knew exactly what was wrong. $454 later the replaced my Throttle Position Sensor, Gas Pedal, Solenoid, Harness. They do a good job at the dealership and always put me in a loaner car so I can go about my day. This seems to be very common in Chevy's and even the dealership said the same thing. Why wouldn't GM recall on this. If the weather wasn't bad this could have turned out different from me and I could have been hurt or killed in an accident. This will be the last GM OR ANY AMERICAN CAR I buy. I would like to stay American unfortunately it is just not practical.

  • gmcustsvcgmcustsvc Posts: 4,068

    @novotnyj said: Had the issue today with my 2009 Chevy Impala which has 67,000 miles on it. Was on the highway when the service transaction control and engine power reduced came on. Car would not drive over 30mph. Thank god the weather was bad and was only driving around 30-40. I was able to get off the high and drove back home. Called my dealership Sunny Side Chevy in Elyria Ohio and they had me bring it in said by me telling them they knew exactly what was wrong. $454 later the replaced my Throttle Position Sensor, Gas Pedal, Solenoid, Harness. They do a good job at the dealership and always put me in a loaner car so I can go about my day. This seems to be very common in Chevy's and even the dealership said the same thing. Why wouldn't GM recall on this. If the weather wasn't bad this could have turned out different from me and I could have been hurt or killed in an accident. This will be the last GM OR ANY AMERICAN CAR I buy. I would like to stay American unfortunately it is just not practical.

    Hello novotnyj,

    We apologize for any inconvenience this situation has posed, and are sorry to hear that the experience with your vehicle has caused you to feel this way. We are happy to hear that your dealership was able to repair this in a timely fashion. If there is anything we can do to assist with your concerns in the future, please feel free to reach out to us.

    Amber N. GM Customer Care

  • Add my 2011 Chevy Impala LT with 66,500 miles on it to the list...

    About 4 months ago my wife reported to me that something had happened to the car, and it said Stabilitrak, but that after a restart the car seemed normal, and the engine light went out after a day or so. I racked it up to a fluke.

    Yesterday on my ride home (I travel 35 miles each way) The engine light came on, the Reduced Power message flashed and luckily I was only going 20mph in Boston traffic. I got over to the breakdown lane, shut the car off and waited a minute, restarted and was able to get home.

    I have an insanely busy week, so I could not take the car to be looked at this morning, and of course, backing out of my driveway, less than 5 yards, it does it again. And again, I shut the car off and restarted and I made it to work...

    In a last ditch effort I shut off the traction control, does that help at all? I am so busy this week, with important matters that I really cannot afford to not have my vehicle...

    I also have a mechanic I trust over the dealerships, has anyone used a local mechanic to fix this issue? Is this covered at all my the powertrain warranty? Have most people found that fixing the Throttle Body is the answer? Are there reports out there on this issue?

    I bought this car with 25k miles on it, and was hoping this would be my workhorse for 10 years... I'm having doubts and buyers remorse (should I have bought the Altima).

  • gmcustsvcgmcustsvc Posts: 4,068

    Hello billtort,

    I definitely recognize your frustration and apologize that you recently experienced this trouble with your vehicle. I understand that you're leaning more towards having your independent mechanic fix this issue for you, but I would like to do some additional research on this matter as well. Could you please message me your contact information and VIN so I can look into any service announcements related to your concern? Thank you for your time and I look forward to hearing from you.

    Amber N. GM Customer Care

  • Kicker to my story, it pulled the same stuff 3 more times on my 32 mile ride home... I am taking it to my mechanic to read the codes in the morning. We will decide if it should go to the dealer.

  • 2007 chevy impala 3.9L finally fixed!!! i posted my problem with my car about a month or so ago its the same problem many are having and after about 600 to 700 bucks worth of dead end work i purchased a $50 wire connector that runs to the throttle motor and like magic the problem is gone. this is after i had it at the dealer twice for them to tell me nothing was wrong and that i would probably have to replace the PCM. basically one of the wires had a short which was probably the ground wire.

  • johngd1johngd1 Posts: 1

    Has anyone confirmed a fix for the "service stabilitrak, reduced engine power" problem? My 2010 Impala LT did it once about a week ago, then after restarting it worked fine, now it's doing it all the time. The car starts and I get the warnings, it idles very rough and isn't driveable. I have an appointment at a dealership to have it looked at tomorrow but I have to figure out how to get it there.

  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,588

    Consensus leans toward new throttle body but that hasn't produced consistent results for everyone.

    MODERATOR

  • gmcustsvcgmcustsvc Posts: 4,068

    Hi johngd1,

    I'm sorry to hear that you're experiencing this concern with your Impala. I am not properly trained to offer technical advice, but if you would like for us to check into anything for you, please feel free to contact us via email at socialmedia@gm.com. In the email please include your full name, contact information, VIN current mileage, and a brief summary of your situation. We look forward to hearing from you soon.

    Kristen A. (Assisting Amber) GM Customer Care

  • larry227larry227 Posts: 1
    I have a 09 impala ss and when I was driving it the message reduce speed popped up n my car start slowing down I im very pissed
  • billtortbilltort Posts: 3

    So my car was looked at by my local mechanic and he checked al the connections and the car was fine for a week, but now has gone back to tripping this stbilitrak once per every trip. I am going to have to take it to the dealership. Can anyone give me a rough idea how much this is going to cost me?

  • jun32jun32 Posts: 1

    I purchased a Chevy 2008 Impala in late January 2013 with less that 55k mile on it, now it's been about a year it's around 64k mile.

    Today on my way to work, the traction control light and engine light are on and there are the message of traction control is on and also the engine power is reduced. I felt the speed of the car reduced, luckily I am on local street without many traffic. After about an hour I tried to tested it again and only the engine light is on, the speed of the car is normal.

    I am not familiar with car problems and also it's my first time to own a car. But I read a lot posts here and found so many people experiencing the similar problems. I am disappointed to learn that GM hasn't resolved this issue.

    I hope I could fix it soon, nobody want a random dangerous situation! I have sent an email to Chvey and waiting to see, and will post once there is an update.

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